This is the first major single-volume edition in English of Book IX of Virgil's Aeneid, a pivotal part of the poem that contains the nocturnal interlude of the ill-fated expedition of the young Trojans Nisus and Euryalus. The volume includes a detailed linguistic and thematic commentary on the text, and an introduction consisting of a series of interpretative essays on the book. It offers invaluable help to students of Virgil and will also be of interest to professional scholars of Latin literature.